- libdb-dev, libical-dev (>=0.43), libldap2-dev, gettext, locales,
- libpam0g-dev, libsieve2-dev, libssl-dev, libexpat1-dev, libcitadel-dev (>= 7.42),
- libcurl4-openssl-dev | libcurl3-openssl-dev, zlib1g-dev, libev-dev (>= 4.0), libc-ares-dev (>= 1.7.2)
+ libdb-dev, libical2-dev, libldap2-dev, gettext, locales,
+ libpam0g-dev, libsieve2-dev, libssl-dev, libexpat1-dev, libcitadel-dev (> 8.13),
+ libcurl4-openssl-dev | libcurl3-openssl-dev, zlib1g-dev,